Re: manual improvement for next() [WAS: How undefined is undefined behaviour?]

[Xmilia Hermit <xmilia.hermit@...>]

> The order of the enumeration is unspecified and may change when new keys
> are added during the enumeration, skipping some keys or returning them
> multiple times, potentially infinitely if the modification continues.

If keys are removed it could raise `invalid key to 'next'` too.

As following code did for me:

local tab = {a=1,b=2}

for k, v in pairs(tab) do
    tab[k] = nil
    tab[k .. "other"] = v
end

Regards,
Xmilia